COMPONENTS IDENTIFIED BY MARK ON THE
SCHEMATIC DIAGRAM AND IN THE PARTS LIST ARE
CRITICAL FOR RISK OF FIRE AND ELECTRIC SHOCK.
REPLACE THESE COMPONENTS WITH ONKYO
PARTS WHOSE PART NUMBERS APPEAR AS SHOWN
IN THIS MANUAL.
MAKE LEAKAGE-CURRENT OR RESISTANCE
MEASUREMENTS TO DETERMINE THAT EXPOSED
PARTS ARE ACCEPTABLY INSULATED FROM THE
SUPPLY CIRCUIT BEFORE RETURNING THE
APPLIANCE TO THE CUSTOMER.
NAC-2.3
WAVE (PCM), MP3, WMA
General
Specifications
Sound format supported by the Net-Tune
(U.S. & Canadian models)
FM: 87.50–108.00 MHz (100 kHz steps)
Tuner Section
Tuning range
monthly error: ±30 seconds
(at 25 °C (77 °F) )
AC 120 V, 60 Hz
58 W (120 V, 60 Hz)
Clock precision
87.5–108.00 MHz (50 kHz steps)
Power supply
Power consumption
(Other area models)
(U.S. & Canadian models)
522–1611 kHz (9 kHz steps)
(Other area models)
AM: 530–1710 kHz (10 kHz steps)
FM: Mono 11.2 dBf,
Usable sensitivity
Standby power
1.0 µV (75 Ω IHF)
8 W
0.9 µV (75 Ω DIN)
Stereo 17.2 dBf,
205 × 91 × 279 mm
Dimensions (W × H × D)
2.0 µV (75 Ω IHF)
8-1/16" × 3-9/16" × 11"
3.9 kg, 8.6 lbs
Weight
23.0 µV (75 Ω DIN)
Stereo 37.2 dBf, 20.0 µV (75 Ω)
AM: 30 µV
FM: Mono 17.2 dBf, 2.0 µV (75 Ω)
50 dB Quieting sensitivity
Capture ratio
Specifications and external appearance are
subject to change without notice as a result of
product improvement.
85 dB (Other area models)
FM: 2.0 dB
FM: 40 dB (U.S. & Canadian models)
AM: 40 dB
FM: 90 dB
AM: 40 dB
Image rejection ratio
IF rejection ratio
Stereo 67 dB, IHF
FM: Mono 73 dB, IHF
AM: 40 dB
Signal to noise ratio
(±300 kHz at 40 kHz Devi.)
FM: 50 dB DIN
Selectivity
AM Suppression Ratio
Stereo 0.3%
50 dB
FM: Mono 0.2%
AM: 0.7 %
Harmonic distortion
30 dB at 100 to 10,000 Hz
FM: 30–15,000 Hz (±1.5 dB)
FM: 45 dB at 1,000 Hz
Frequency response
Stereo separation
Stereo threshold
FM: 17.2 dBf, 2.0 µV (75 Ω)
both channels driven 1 kHz, with no more
than 0.1%
2 × 15 watts at 8 Ω, 1 kHz
Specifications
Amplifier Section
Power output
FTC15 watts per channel, min RMS, at 8 ohms,
DIN2 × 17 watts at 6 Ω, 1 kHz
2 × 27 watts at 6 Ω
2 × 24 watts at 8 Ω
0.1% at rated power
0.6% at rated power
Dynamic power output
Total harmonic distortion
IM distortion
30 at 8 Ω
AUX: 150 mV, 50 kΩ
FIXED: 150 mV, 2.2 kΩ
VARIABLE: 2 V, 470 Ω
Damping factor
Input Sensitivity and Impedance
Output Level and Impedance
Frequency and response
10 to 50,000 Hz +0 /–3 dB
100 dB (IHF-A)
Signal to noise ratio
Muting
–40 dB
IEC type × 1
AC Inlet
OPERATING INSTRUCTIONS
WARNING
AVIS
SAFETY PRECAUTIONS
NAC-2.3
WARNING
RISK OF ELECTRIV SHOCK
DO NOT OPEN
AVIS
WARNING : TO REDUCE THE RISK. OF
ELECTRIC SHOCK, DO NOT REMOVE
COVER(OR BACK). NO USERSERVICEABLE
PART INSIDE, REFER SERVICING TO
QUALIFIED SERVICE PERSONNEL.
TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS APPLIANCE TO RAIN
WARNING :
OR MOISTURE. DANGEROUS HIGH VOLTAGES ARE PRESENT INSIDE THE ENCLOSURE. DO NOT OPEN THE
CABINET. REFER SERVICING TO QUALIFIED PERSONNEL ONLY.
CAUTION :
TO PREVENT ELECTRIC SHOCK, MATCH WIDE BLADE OF PLUG TO WIDE SLOT, FULLY INSERT.
POUR EVITER LES CHOCS ELECTRIQUE, INTRODUIRE LA LAME LA PLUS LARGE DA LA FICHE DANS LA
ATTENTION :
BORNE CORRESPONDANTE DA LA PRISE ET POUSSER JUSQU' AU FOND.
RISQUE DE CHOC ELECTRIQUE NE
PAS OUVRIR
The lightning flash with arrowhead symbol, within an equilateral triangle, is
intended to alert the user to the presence of uninsulated "dangerous voltage"
within the product's enclosure that may be of sufficient magnitude to constitute
a risk of electric shock to persons.
The exclamation point within an equilateral triangle is intended to alert the user
to the presence of important operating and maintenance (servicing) instruction
in the literature accompanying the appliance.
PRECAUTIONS
1. Replacing the fuses
For continued protection against risk fire, replace only with same type and same rating fuse.
CIRCUIT No. PART No. DESCRIPTION
F901 252157 1.25A-UL/T-237, FUSE
CAUTION
FOR CONTINUED PROTECTION
AGAINST FIRE HAZARD, REPLACE
ONLY WITH FUSE OF SAME TYPE
VA
AND RATING INDICATED.
ATTENTION
AFIN D'ASSURER UNE PROTECTION
PERMANENTE CONTRE LES RISQUES
D'INCENDIE, REMPLACER UNIQUEMENT
VA
PAR UN FUSIBLE DE MEME TYPE
ET CALIBRATION COMME INDIQUE.
THIS SYMBOL LOCATED NEAR THE FUSE INDICATES
THAT THE FUSE USED IS SLOW OPERATING TYPE
FOR CONTINUED PROTECTION AGAINST FIRE
HAZARD,REPLACE WITH SAME TYPE FUSE. FOR FUSE
RATING REFER TO THE MARKING ADJACENT TO THE SYMBOL
CE SYMBOLE INDIQUE QUE LE FUSIBLE UTLISE EST
E LENT. POUR UNE PROTECTION PERMANENTE,N'UTILISER
QUE DES FUSIBLES DE MEME TYPE. CE DARNIER EST
INDIQUE LA QU LE PRESENT SYMBOL EST APPOSE.
2. Safety-check out (Only U.S.A. model)
After correcting the original service problem, perform the following safety check before releasing the set
to the customer. Connect the insulating-resistance tester between the plug of power supply cord and
screw on the back panel.
Specifications: 3.3Mohm+/-10% at 500V.
Meaning
Unable to connect the station during searching the Internet
radio stations.
Unable to receive the streaming data from the selected
Internet radio station.
Unable to play the selected Internet radio station. Select
other Internet radio stations.
Receiving the streaming data from the Internet radio station
is timed out.
There are no preset radio stations for FM, AM and Internet
radio.
Tried to play the content with protection.
Cancel the protection before ripping the content.
NAC-2.3
No Stations
Client FL display message
Input source
Troubleshooting
Stream Access Err
Internet Radio
Internet Radio
Meaning
No Stream
iNet Radio Timeout
Internet Radio
Internet Radio
No Presets
Playback Denied
FM/AM/
Internet Radio
Server/
Internet Radio
This product used a microcomputer to perform
various advanced functions. However, noise,
radio interference, or static electricity could
occasionally cause the unit to malfunction. In this
case, unplug the power cable from the AC outlet,
then plug it in again in five seconds.
Integra/Onkyo is not responsible for damages
(such as CD rental fees) due to unsuccessful
recordings caused by the unit’s malfunction.
Before you record important data, make sure that
the material will be recorded correctly.
Restoring the factory default settings:
To reset all the stored settings to the factory
default conditions, while the power to the NAC-
2.3 is on, press and hold down the STOP button
on the unit, and press Standby/On button.
Unable to find the album information during searching the
No Albums
Client FL display message
Input source
Troubleshooting
Error messages
Server
music library.
Unable to find the artist information during searching the
music library.
Unable to find the genre information during searching the
music library.
Unable to find the playlist during searching the music
library.
Unable to find the track during searching the music library.
The track using unsupported format was selected during
searching the music library.
The music library on the Net-Tune server is updated. The
selected list is discarded and the selecting operation is reset.
Select tracks for new playlist again.
The Net-Tune server does not respond. Check the operation
status for the Net-Tune server.
The Net-Tune server function is not available. A global IP
No Artists
No Genres
No Playlists
No Tracks
Unsupported Format
Server
Server
Server
Server
Server
List Changed
Server
Server Timeout
Server not available
Server
Server
address may be set for the IP address setting.
There is an error for playing the audio stream. The server
load may be increased, which may result from too many
client connections, too much PCM stream distribution, any
other applications on the Net-Tune server, and so on. Take
the appropriate measures
The list you selected contains 1,000 or more tracks.
You can add up to 999 tracks per list. Divide the list into
several lists so that each list contains 999 or fewer tracks,
which enables you to play all tracks in a list (see the Net-
Stream Error
Server
TrackList Over →
[1 of 999]
Server
Tune Central Help).
AlbumList Over →
[1 of 999]
ArtistList Over →
[1 of 999]
Unable to retrieve the genre information during searching
the Internet radio stations.
PlaylistList Over →
[1 of 999]
No Genres
Internet Radio
Unable to retrieve the language information during
searching the Internet radio stations.
Unable to retrieve the country information during searching
the Internet radio stations.
Unable to retrieve the sub-genre information during
searching the Internet radio stations.
No Languages
No Countries
No Sub Genres
Internet Radio
Internet Radio
Internet Radio
On Screen Display (OSD)
OSD menu flowchart
(Internet Radio)
AUDIO INPUTCursor Cursor SELECTDISPLAY
AUDIO INPUT
AUDIO INPUT
Auxiliary Input
FM Radio
AM Radio
Cursor
Tune to station
Tune to station
Select station
to preset
Select station
to preset
Select
character type
Select
character type
Cursor SELECTDISPLAY
, SELECT
Input station
name
, SELECT
Input station
name
SETUP
SETUP
Select preset
number
Select preset
number
SELECT
SELECT
Save preset
station
Save preset
station
NAC-2.3
SELECTSELECTSELECT
Select album
title
SELECT
SELECT
Select artist
name
>Artists
Select genre
SELECTSELECTSELECT
SELECT
Select Genre
SELECTSELECT
Select Location
SELECTSELECT
Select
Language
Cursor
Cursor
Select track
Select album
title
SELECT
Select album
title
SELECT
Select trackSelect playlist
Select Sub
Genre
Select station
Select station
SELECT
SELECT
SELECT
Server
DISPLAY
>Albums
Cursor
Cursor
AUDIO INPUT
>Genres
Cursor
>Playlists
AUDIO INPUT
Internet RadioSelect station
(FM Radio)
DISPLAYSELECT
>Genres
Cursor
>Location
Cursor
>Language
Playback
Select track
Select track
Playback
SELECT
Playback
SELECT
Playback
Changing the remote controller
mode
When you use any Integra/Onkyo products other
than the NAC-2.3 in the same room, the
operations made with the NAC-2.3’s remote
controller may also cause the other Integra/Onkyo
products to operate. To avoid this, you can change
the remote controller mode both for the NAC-2.3
and its remote controller choosing from three
modes (1, 2 or 3).
To change the remote controller mode for the
remote controller, hold the Standby button on the
remote controller and press the Select button, then
CE SYMBOLE INDIQUE QUE LE FUSIBLE UTLISE EST
E LENT. POUR UNE PROTECTION PERMANENTE,N'UTILISER
QUE DES FUSIBLES DE MEME TYPE. CE DARNIER EST
INDIQUE LA QU LE PRESENT SYMBOL EST APPOSE.
5
THIS SYMBOL LOCATED NEAR THE FUSE INDICATES
THAT THE FUSE USED IS SLOW OPERATING TYPE
FOR CONTINUED PROTECTION AGAINST FIRE
HAZARD,REPLACE WITH SAME TYPE FUSE. FOR FUSE
RATING REFER TO THE MARKING ADJACENT TO THE SYMBOL
6
R902
0.22
(1/2W)
R901
0.22
(1/2W)
R907
(1/2W)
150
R908
150
1SS352
(1/2W)
5
P923A
P924
1.25A/125V
1
F901
FUSE
2
T.FUSE
R909
470
DE1307E472MKH
10
UDZ5.1B
C902
NCH-3489
NCH-3567
D913
C921
14
13
12
11
D911
1SS352
(1/2W)
D912
C920
4.7/16
P922A
472M
P-OFF
223
R910
P921A
P928A
P924A
L901
DE1307E472MKH
10K
P929A
472M
C901
P926
P927
P927A
P926A
NAPS7655
NAC-2.3
P41/
53
P72/
28
R7255
A
SCHEMATIC DIAGRAM - 3
1
ONSCREEN SCLK
19
ONSCREEN SIN
ONSCRENN CS
+5V
+5V GND
15
PWR(SP RELAY)
AMUTE
TC9413 STB
TC9413 DATA
TO VIDEO PWB
2
3
10
5
1
TC9413 CLK
TC4052 A
TC4052 B
IR
IR GND
SP RELAY +VCC
SP RELAY GND
TUNER Lch OUT
+5.6v
TUNER Rch OUT
P102B
RN1241
RN1241
2.2K
Q102
Q101
2.2K
R103
R113
10K
R104
R101
100K
C107
472
Q103
DTA114ES
C101
0.47/50
1K
R105
R106
4.7K
R108
39K
3.3/50
+0.5V
39K
STEREO
R112
BCD
R7263
1K
220
220
220
220
220
220
220
R7267
R7271 220
R7268
R7269
R7270
RDSDA
P20/72P21/71P22/ 70
R01100
RDSSIG
R7212
C7213
104Z
P23/ 69
P24/ 68
P8611P87/10
RESET
13
12
RESET
1K
CST16.00MXW0C1
R7266
SD
P25/ 67
Q7001
M16C/62A
VSS14
P26/66P27/ 65
XIN/15XOUT/
X7201
R7279
1K
FLWR
FLSEL
R7280
1K
80
R7281
1K
R7282
R7283
R7284
R7285
R7286
R7287
R7288 1K
P10
P07/81
1K
P06/82
1K
P05/83
1K
P04/84
1K
P03/85
1K
P02/86
1K
P0187
P0088
RDSEN
P107/89
AREA2
P106/90
AREA1
P105/91
HPDET
92
P104/
P10393
MODEL
P102
94
KEY1
P10195
AVSS96
KEY0
P10097
98
VREF/
AVCC99
P97/100
P96
1
OSDDA
OSDCL
47K
R7202 1K
R7201 1K
R704
FLDA7
FLDA6
FLDA5
000J
10K
R7289
R7494
102K
C7294
2.7K
R7394
R7391 10K
C7291
R7290
102K
000J
R7493
2.7K
4.7K
4.7K
10K
R102
100K
R114
472
C108
NP200NP200
C104
1/50
C102
39K
R107
C103
101
C7297
R7395
R7397
102K
2.7K
C7206
104Z
2.7K
C7295
102K
R7390
R7389
10K
R7291
R7292
FLDA4
FLDA3
FLDA2
FLDA1
FLDA0
10K
4.7K
R7294
R7295
4.7K
R7297
4.7K
C7205
100/6.3
220
R7278
SELA
SELB
P11/79P12/78P13/
P94/3
P95/2
OSDCS
R72031KR7205
R7274
220
R7272
FLBUSY
R7277
77
P14/76P15/ 75
P16/ 74
P17/ 73
P92/5P93/4
BYTE8CNVSS/9
P917
P91/
6
IRIN
IRMAIN
100
1K
R7206
R7260220
R7259
R7257
R7256
474J
C7204
63
P30/
P32/ 60
VCC262
VSS264
P31/ 61
VCC16
P82/20P83/19P84/18P85/
17
1K
POFF
R7220
474
C7203
C7202
220
220
220
220
AMUT
VOLCL
VOLDA
VOLSTB
54
P33/59P34/ 58
P35/57P36/ 56
P37/55P40/
P73/27
P77/23P80/22P81/21
P74/26P75/25P76/
24
FLTWST
STBLED
270
R7225
100/6.3
FMSIGNALOUT
CLDICE
DO
GND
VDD +5V
FM SIGNAL OUT
AREA1
R7391
R7493
JPN
FMDETOUT
VDD +12V
FM DET OUT
LOUT
ROUT
TUMUT
15105
GND
TUNED
R OUT
L OUT
STEREO
MUTING
FLDA7
FLDA6
FLDA5
FLDA4
FLDA3
R309
R301
220K
C301
TC9413AP
R302
220K
VCC
10/50
Q301
C302
GND
CS1CS2
10/50
R307
FLDA2
10111213141516
GND
GND
220
GNDSTB
220
R7821KR783 1K
R781 1K
FM/AM TUNER
RDSEN
AREA2
R7289
R7290
USAEXP
R7389
R7390
EU
NAC-2.3MODEL
82K
10K
R109
680K
C105
223Z
Q104
2S1740S-R
223Z
C106
1K
R111
3.3K
R110
AF6146CG
16
RDSCLK
RDSSIG
1234567
10K
R784
R786 10K
R785 10K
X781
15
T57
RDSDATA
C786
C781
CH220J
C782
13
14
X1
X0
Q781 BU1923
INPUT
VREF
+2.5V
C785
2.2/50
CH220J
11
12
VDD2
VSS2
VSS1
VDD1
223Z
NADG-7651
D781
1SS352
10
T1
T2CMP
VSS3
89
561K
C784
P308B
1
5
8
3456789
1
D7D6D5D4D3
220
VCC
VCC
VDDVSS
1
P7001A
FLDA1
FLDA0
PLUG_20
FLWR
19
17
RXD
WRD0D1
D2
GND
/TEST
DATA
CK
R308
FLSEL
18
BUSY
/SEL
C303
R311
100
22/50
101
C321
220
101
C322
220K220K
C304
100
R312
22/50
CEDICL
P101B
FFC
1
FM
AM
4
L
H
R7394
5
R7494
NAC-2.3
P34/ 58
P77/23
100/6
3
220
A
BCD
SCHEMATIC DIAGRAM - 4
C959
L951
47
C958
I
NAAF-7652
C968
682
104
MPC29M12HF
C933
P913B
P913A
104
8
123
104
C923
104
C954
78M56
O
7
SI-8010GL
104
Q913
I
G
C922
104
6
Q905
104
C955
Q906
RN1407
R923
(1W)
12
R924
12
(1W)
C961
220/25
(1/2W)
2.2
104
473
C956
C953
45
D951
RK16
C951
C957
220/25
47
R951
(1/2W)
(1/2W)
10K
R965
G
R964
10K
Q909
IRLML6401
0.47
(1/2W)
R922
D901
+16V
R912
104
R915
2.2
S
D
D3SBA20
C908
4700/35
(1/2W)
2.2
R905
P7003B
104
C907
TO PS PWB
Q908
IRLML6401
D7003
R7003
D7004
1SS352
TO ETHER PWB
5
1
P606A
+5.6V
G
C910
104
1SS352
+5.0V
Q7002
RN1404
103Z
C7002
D7005
GND
GND
GND
+5V
+5V
D
S
C962
470/6.3
C7001
2.2/50
+5.6V
470
R953
2.2K
+5.0V
1SS352
R952
C952
220/16
B+5
470/6.3
RN1407
Q904
Q907
O
G
C934
105
1
R7257220
R7256
220
VOLCL
VOLDA
VOLSTB
P35/57P36/ 56
2
24
STBLED
270
.
3
55
P37/
P74/26P75/25P76/
R7225
220
R7255
P40/54P41/53P42/
P72/28P73/
27
1K
FLTWST
R7228
52
51
P44/ 50
P45/
P46/ 48
P47/ 47
P50/ 46
P51/ 45
P52/ 44
P53/ 43
P54/ 42
P55/ 41
P56/ 40
P57/ 39
P60/ 38
P61/ 37
P62/ 36
P63/ 35
P64/ 34
P65/ 33
P66/ 32
P67/ 31
P7030
P71/29
FLTX
C7003
0.1
P43
VR_MUTE
DIGDO
49
DAMUT
DIGCL
DACS
DARST
XPOR
XURESET
DITCS
DITPD
POWER
NETRX
NETTX
100
R7230
R708 10K
13TO ETHER PWB
P610A
XDACS
XDARST
DAMUTE
DIGCL
DIGDO
XDITCS
XDITPD
R7002
100
220
R7249
R7248220
R7247
220
220
R7245
R7244
220
220
R7243
220
R7242
R7240
220
220
R7239
R906 10K
R7232 100
R7231
P01
R710 10K
100
10K
COM2_RXD
COM2_TXD
R709
(XPOR)
(XURESET)
1
R707
10K
3.3K
R706
3.3K
R705
Q714
S-3531AEFS
123
CST32.768KXW0C1
X703
P702
678
R904 100K
47K
104
C706
45
C702
30P
C703
CH100D
FFC
GND
F32K
RESET
CNVSS
RXD
CLK
VDD
RTS
TXD
GND
7001A
LUG_20
9
RXD
FLSEL
0
4
BUSY
Q7005
1
20S4D1DA2
03
R311
100
0
101
C321
101
5
C322
04
100
R312
0
8
3
2
NJM4565M-D
220K
R313
R317
3.9K
R318
R314
220K
3.9K
NJM4565M-D
6
5
R323
1
Q302
330
4
R321
10K
C327
101
101
C328
R322
10K
R324
Q302
7
330
R327
C329
330
47/16
18K
R325
Q307
RN1241
Q308
RN1241
18K
R326
R328
C330
47/16
330
3456789
101112131415161718
220
(1/2W)
R305 4.7
R3064.7
(1/2W)
C306
C305
100/16
Q323
RN1241
Q324
RN1241
100/16
C307
R310
220K
4.7/50
Q304
KRA107S
KEY GND
REM SIG
K1
K0
+5V
5
GND
STANDBY LED
HP-IN
8
P7004A
P7004B
P7006B
11
3
P7006A
VR DOWN
R7009
330
S7011
R7004
R7010
560
470
FSKIP
S7013
S7012
Stop
R7014
560
RIGHT
S7003
Play/Pause
DOWN
R7005
R7015
R7006
1.2K
820
S7014
S7015
VR UP
R7016
1.2K
820
S7004
S7005
LEFT
R7007
2.2K
Audio Input
UP
R7017
2.2K
S7016
S7006
Display
ENTER
R7008
3.9K
S7017
S7018
RSKIP
S7007
NAETC-7657
R7012
P7001B
PLUG_20
19
P504B
1
U7001
223Z
REMSENS
6
10K
R320
STANDBY LED
D7001
R7001
C7010
C7011
100/6.3
100
330
STANDBY/ON
S7001
SETUP
R7013
470
S7002
101
C552
223Z
C550
P554 P553
P551
101
P552A
C551
NADIS-7656
NADG-7651
PRINTED CIRCUIT BOARD VIEW - 1
U000:AF-7660
Component side
C905
D905
C914
P510
C906
P503B
C913
Soldering side
J503A
C914
C913
R913
R914
C507
Q902
C508
C916
J503B
C915
Q901
P505A
Q501
C501
P504A
L501
3
C502
C505
C506
25137660
NCAF-7660
R524
L501
L502
L502
R526
C512
C511
R525
NAC-2.3
P552A
R355
P502B
P507B
R356
R523
U003:VD-7654
Component side
J502
P102A
C918
J501
1
X271
P306A
C513
R513
NCVD-7654
25137654
C282
Q275
X281
C296
Q274
C289
R510
Q504
Q503
R509
P601
L271
C275
C276
P608A
C992
C297
C256
R296
P251
U701
P601
U701
P251
C917
R503
R506
R501
R508
R502
R504R505
R507
Soldering side
R256
R292
C270
C285
C295
R293
R294
C283
C290
Q271
Q271
C298
1
C288
C274
R275
R274
R276
C272
R273
C273
C995
C299
C991
L991
C994
R991
R992
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